Power conversion apparatus
AssigneeFuji Electric Co., Ltd.
InventorsSeitaro BANNO, Satoru FUJITA
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Abstract
A power conversion apparatus includes first, second, third, and fourth switching elements. In a first period, the second and third switching elements are switched ON, and first and fourth switching elements are alternately switched ON/OFF. In a second period, the first and fourth switching elements are switched ON, and the second and third switching elements are alternately switched ON/OFF. In a third period, the first and second switching elements are switched ON, and the third and fourth switching elements are switched OFF. The power conversion apparatus provides a release path for inductive energy accumulated in a reactor.
Claims13
A power conversion apparatus for connection to a pair of terminals of an AC power source to supply an AC voltage to a load, comprising:
- a first bidirectional switch that includes a first switching element and a second switching element connected in series or in parallel;
- and
- a second bidirectional switch that includes a third switching element and a fourth switching element connected in series or in parallel, the second bidirectional switch being connected to the load,
- wherein when a voltage of the AC power source is between a first reference voltage, which is higher than zero, and a second reference voltage, which is lower than zero, the voltage of the AC power source is supplied to the load by switching ON the first and second switching elements of the first bidirectional switch and switching OFF the third and fourth switching elements of the second bidirectional switch.
A power conversion apparatus for connection to a pair of terminals of an AC power source to supply an AC voltage to a load, comprising:
- a reactor;
- a first bidirectional switch that includes a first switching element and a second switching element connected in series or in parallel;
- a second bidirectional switch that includes a third switching element and a fourth switching element connected in series or in parallel, the second bidirectional switch and the reactor being connected in series to the pair of terminals of the AC power source;
- and
- a capacitor, the capacitor, and the second bidirectional switch being connected in series across the first bidirectional switch,
- wherein when a voltage of the AC power source is between a first reference voltage, which is higher than zero, and a second reference voltage, which is lower than zero, the voltage of the AC power source is supplied to the load by switching ON the first bidirectional switch and switching OFF the second bidirectional switch.
Dependencies are inferred from the claim text.